Heterocycles represent the most important and diverse variety of natural products.
Nowadays there are plenty of heterocycles that are known, the quantity is growing …

Methyl-1-phenyl-1, 5-dihydro-pyrazolo [3, 4-d] pyrimidine-4-thione was prepared and used
as a key compound for the preparation of some S-acyclic nucleosides of pyrazolo [3, 4-d] …

Heterocyclic pyrimidine nucleus includes four carbon and two nitrogen atoms and is
pharmacologically in active; however, its synthetic derivatives have important roles in …

Abstract The synthesis of pyrazolo [3, 4-d] pyrimidine derivatives is important due to their
presence in various biologically active compounds such as anticancer, antimicrobial …

Modified carbocyclic nucleosides (4a–g) constituting 7-deazapurine, 4′-methyl, exocyclic
double bond and 2′, 3′-hydroxy were synthesized. NOE and X-ray studies of 4c …

Twelvenovel5 arylformamido 6 arylamino pyrazolo [3, 4 d] pyrimidin 4
onederivatives (3a~ 3l) weresynthesizedviatandemaza Wittigandannulationreactionsoftheiminopho …